56515143 has 4 divisors (see below), whose sum is σ = 75353528. Its totient is φ = 37676760.

The previous prime is 56515141. The next prime is 56515159. The reversal of 56515143 is 34151565.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 56515143 - 2¹ = 56515141 is a prime.

It is a super-2 number, since 2×56515143² = 6387922776620898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56515143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56515141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9419188 + ... + 9419193.

It is an arithmetic number, because the mean of its divisors is an integer number (18838382).

Almost surely, 2^56515143 is an apocalyptic number.

56515143 is a deficient number, since it is larger than the sum of its proper divisors (18838385).

56515143 is a wasteful number, since it uses less digits than its factorization.

56515143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18838384.

The product of its digits is 9000, while the sum is 30.

The square root of 56515143 is about 7517.6554190785. The cubic root of 56515143 is about 383.7557922640.

The spelling of 56515143 in words is "fifty-six million, five hundred fifteen thousand, one hundred forty-three".